宁夏北部引黄灌区直播水稻优化栽培数学模型研究

Study on the Directly Sow Rice Optimized Culture Mathematics Model of DrawYellow Irrigation District North of Ningxia

研究结果,宁夏北部引黄灌区直播水稻每公顷产量7 500 kg以上的技术方案为,每公顷基施有机肥 45 000 kg,播量为333-375 kg,施纯N 259.5-280.5 kg,施P2O5 120-136.5 kg;中等肥力的田块上直播 水稻每公顷产量达8 250 kg以上,其技术方案为:在基施有机肥45 000 kg/hm2的基础上,播量为 301.5-340.5 kg/hm2,施纯N 268.5-289.5 kg/hm2,施P2O579.5-90 kg/hm2。

Study result:the technical scheme of each hectare output of direct brodcast rice that more than 7 500 kg in draw yellow irrigation district of north of Ningxia is , per hectare use 45 000 kg organic fertilizer, broadcast quantity is 333-375 kg, use pure N 259.5-280.5 kg, use P2O5 120-136.5 kg; On the field piece of medium fertility, each hectare output of direct brodcast rice reaches over 8 250 kg,the technology scheme is:on the basis of uses organic fat 4 500 kg/ hm2 ,broadcast quantity is 301.5-340.5 kg/hm2, use pure N 268.5-289.5 kg/hm2, use P2O5 79.5-90 kg/hm2.